<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<form method="post" action="testSecuredSale">
    <input type="hidden" th:name="${_csrf.parameterName}" th:value="${_csrf.token}">
    用户名：<input type="text" name="username"/><br>
    密码：<input type="password" name="password"/><br>
    <button type="submit">修改</button>
</form>
</body>
</html>